Regarding pass through, have you used any unsupported card? Have you ever tested it with a fast ethernet card?
Not sure what you mean by fast - I'm using a couple of realtek gigabit cards passed through, it's not easy to find a pci-x NIC that isn't supported in ubuntu…
I'm really interested in this setup but before replacing my processor with a vt-d one I need to make sure fast ethernet old PCI cards are supported by VmDirectPath (Pass through)
Given the IO is passed through, I don't think that the card is particularly relevant. I'm running with pci-x cards. You could potentially use pci cards, but the pass through capability will pass through all the pci cards (or none of them). I've never tried pci pass through - only pci-x.
Remember that the motherboard has to be IOMMU capable as well…
Working with an intel DP67BA just need to get a new processors since I did not know core i3s do not support VT-D.